Thailand

… Measures determined by the State in order to eliminate an obstacle to or to promote a person’s ability to exercise their rights or liberties on the same basis as other persons or to protect or facilitate children, women, the elderly, persons with disabilities or underprivileged persons shall not be deemed as unjust discrimination under paragraph three. ... (Sec. 27)

Any political party which sends a candidate for election on a constituency basis shall have the right to send a candidate for election on a party list basis.
In sending a candidate for election on a party list basis, each political party shall prepare one list of candidates, in which candidates for election of each political party shall not be the same as others’ and not be the same as the names of candidates for election on a constituency basis. Such list of candidates shall be submitted to the Election Commission prior to the end of the period for application for candidacy for election of Members of the House of Representatives on a constituency basis.
In the preparation of a list of candidates under paragraph two, the members of the political party shall be allowed to participate in the deliberations, and regard shall be had to the candidates for election from different regions and equality between men and women. (Sec. 90)

The House of Representatives and the Senate have the power to enact rules of procedure governing the election and performance of duties of the President, Vice-Presidents, matters or activities which are within the duties and powers of each standing committee, performance and quorum of committees, sittings, submission and consideration of organic law bills and bills, submission of motions, consultation, debate, passing of a resolution, recording and disclosure of the passing of a resolution, interpellation, general debate, observation of the rules and orders and other relevant matters, as well as the power to enact rules of procedure regarding the code of ethics of members and committee members and other matters for the implementation of the Constitution.
The rules of procedure under paragraph one in the part concerning the appointment of an ad hoc committee for the consideration of bills the substance of which is decided by the President of the House of Representatives to concern with children, youths, women, the elderly, the disabled or handicapped, shall stipulate that such ad hoc committee consists of the said types of persons or representatives from private organisations concerned directly with the respective types of persons, of at least one-third of the total number of the ad hoc committee members, and in the part concerning the consideration of bills introduced by a petition of persons having the right to vote, shall stipulate that such ad hoc committee consists of representatives of the persons having the right to vote who sign a joint petition to introduce such bill, of at least one-third of the total number of the ad hoc committee members. (Sec. 128)